Company lists · Data refreshed September 2026

Top 25 Customer data companies worldwide

Name: Customer data companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 11,110 companies tracked

RevenueBase identified 11,110 customer data companies worldwide as of September 2026 and tracks 204,712 professional contacts across them, including 66,027 with verified work emails. The United States is the largest market and London the largest hub.

This list covers customer data companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026. Country and city lists for customer data companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

11,110Companies

204,712Contacts tracked

66,027Verified emails

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The 25 largest customer data companies worldwide

Ranked by team size

Top 25 of 11,110 customer data companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to customer data companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kantar	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	10001+	15,564 contacts →
	Partial evidence “Kantar is the world’s leading marketing data and analytics business.” Source: RevenueBase Database · checked Sep 21, 2026
2	Epsilon	Strong evidence	Irving, TX, United StatesHQ checked Sep 21, 2026	5,001-10,000	9,953 contacts →
	Strong evidence “Epsilon is a global leader in data and identity with deep expertise in digital media, clean rooms, customer data platforms, loyalty and marketing services.” Source: RevenueBase Database · checked Sep 21, 2026
3	Circana	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	5,001-10,000	5,571 contacts →
	Indirect evidence “At Circana, we measure and accelerate demand.” Source: RevenueBase Database · checked Sep 21, 2026
4	Zoominfo	Partial evidence	Vancouver, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,029 contacts →
	Partial evidence “ZoomInfo (NASDAQ: GTM) is the go-to-market platform that helps businesses find, acquire and grow their customers.” Source: RevenueBase Database · checked Sep 21, 2026
5	Acxiom	Partial evidence	Conway, AR, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,241 contacts →
	Partial evidence “Acxiom puts data to work, solving complex challenges for the world’s leading brands and agencies.” Source: RevenueBase Database · checked Sep 21, 2026
6	Dunnhumby	Indirect evidence	Brook Green, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,857 contacts →
	Indirect evidence “dunnhumby helps businesses grow through faster, better decision making, as the essential intelligence layer connecting the world’s leading retailers and brands.” Source: RevenueBase Database · checked Sep 21, 2026
7	Klaviyo	Indirect evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,789 contacts →
	Indirect evidence “Klaviyo (NYSE: KVYO) is the autonomous B2C CRM.” Source: RevenueBase Database · checked Sep 21, 2026
8	MRM	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,627 contacts →
	Indirect evidence “MRM is a modern relationship marketing agency that builds enduring brand relationships.” Source: RevenueBase Database · checked Sep 21, 2026
9	BRAZE	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,142 contacts →
	Strong evidence “Braze is the leading customer engagement platform that empowers brands to Be Absolutely Engaging.™ Braze allows any marketer to collect and take action on any amount of data from…” Source: RevenueBase Database · checked Sep 21, 2026
10	IRI	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	5,001-10,000	1,700 contacts →
	Partial evidence “IRI is a leading provider of big data, predictive analytics and forward-looking insights that help CPG, OTC healthcare, retailers and media companies to grow their businesses.” Source: RevenueBase Database · checked Sep 21, 2026
11	Caci LTD	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	1,663 contacts →
	Partial evidence “CACI offers an unrivalled range of data, marketing and IT solutions to a wide range of industries across both the public and private sectors.” Source: RevenueBase Database · checked Sep 21, 2026
12	Infocepts	Partial evidence	Washington Dc, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,485 contacts →
	Partial evidence “Infocepts enables improved business results through more effective use of data, AI & user-friendly analytics.” Source: RevenueBase Database · checked Sep 21, 2026
13	Hearts & Science	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,359 contacts →
	Partial evidence “Hearts & Science, an Omnicom Media Group agency, transforms data signals into meaningful connections between brands and consumers that drive exponential growth.” Source: RevenueBase Database · checked Sep 21, 2026
14	Similarweb	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,351 contacts →
	Partial evidence “We power businesses with the best digital data.” Source: RevenueBase Database · checked Sep 21, 2026
15	Annalect	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	5,001-10,000	1,327 contacts →
	Partial evidence “Over a decade ago, Omnicom created Annalect to reimagine the future of marketing, at the crossroads of data, tech, analytics, and AI.” Source: RevenueBase Database · checked Sep 21, 2026
16	Verticurl A WPP Company	Indirect evidence	SingaporeHQ checked Sep 21, 2026	1,001-5,000	1,256 contacts →
	Indirect evidence “Verticurl, a division of Ogilvy, was established in 2006 with the mission to be the world’s leading marketing technology services agency for multinational organizations.” Source: RevenueBase Database · checked Sep 21, 2026
17	J.D. Power	Indirect evidence	Troy, MI, United StatesHQ checked Sep 21, 2026	501-1,000	1,200 contacts →
	Indirect evidence “J.D.” Source: RevenueBase Database · checked Sep 21, 2026
18	Dialog Direct	Strong evidence	Highland Park, MI, United StatesHQ checked Sep 21, 2026	10001+	1,138 contacts →
	Strong evidence “Dialog Direct helps brands manage and personalize their multichannel, multi-touch customer journeys using data-driven marketing and customer engagement solutions.” Source: RevenueBase Database · checked Sep 21, 2026
19	Data Axle	Partial evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Data Axle helps clients create a foundation of clean data, find new leads, develop winning strategies, design beautiful campaigns, and can handle all day-to-day execution needs” Source: RevenueBase Database · checked Sep 21, 2026
20	Demandscience	Partial evidence	Boston, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,087 contacts →
	Partial evidence “With proprietary data and omni-channel activation like events, content, programmatic and chat, we cut through the noise to reach entire buyer groups, driving engagement and impact…” Source: RevenueBase Database · checked Sep 21, 2026
21	Insider	Strong evidence	Istanbul, TürkiyeHQ checked Sep 21, 2026	1,001-5,000	1,036 contacts →
	Strong evidence “Insider-one platform for individualized, cross-channel experiences-enables enterprise marketers to connect customer data across channels and systems, predict their future behavior…” Source: RevenueBase Database · checked Sep 21, 2026
22	Mresult	Partial evidence	Mystic, United StatesHQ checked Sep 21, 2026	501-1,000	929 contacts →
	Partial evidence “About MResult MResult is a leading data & analytics intelligence technology solutions provider to companies that value insights from information as a competitive advantage.” Source: RevenueBase Database · checked Sep 21, 2026
23	SEM	Indirect evidence	Sariyer, TürkiyeHQ checked Sep 21, 2026	n/a	883 contacts →
	Indirect evidence “SEM is a global new generation consumer marketing and technologies brand where we combine growth consultancy, advanced analytics, digital marketing and technology services under…” Source: RevenueBase Database · checked Sep 21, 2026
24	Emarsys	Partial evidence	Vienna, GermanyHQ checked Sep 21, 2026	501-1,000	831 contacts →
	Partial evidence “SAP Engagement Cloud (formerly SAP Emarsys) helps organizations power unique engagement by connecting real-time customer insights with the operational signals that run the…” Source: RevenueBase Database · checked Sep 21, 2026
25	Onemagnify	Indirect evidence	Detroit, MI, United StatesHQ checked Sep 21, 2026	501-1,000	824 contacts →
	Indirect evidence “At OneMagnify, we help transformational brands turn insight into action.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: customer data companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names customer data companies.
Partial evidence: Its own public description names part of customer data companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name customer data companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 11,110 customer data companies worldwide

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Customer data companies worldwide at a glance

As of Sep 21, 2026

32.3%Verified-email coverage

18.4Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

6,339

11-50

3,342

51-200

1,025

201-500

236

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among customer data companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for customer data companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “customer data companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names customer data companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among customer data companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 66,027 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Customer data companies by location

66 lists · largest first

Every Customer data companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names customer data companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many customer data companies are there worldwide?

RevenueBase identified 11,110 customer data companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Kantar, headquartered in London, tops this list with the largest team on record.

Which country has the most customer data companies?

The United States leads with 3,141 companies, followed by India (879) and the United Kingdom (757). Every customer data companies list by country and city is linked on this page.

Which city has the most customer data companies?

London leads with 347 headquartered companies, followed by New York (204) and Sao Paulo (197).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 66,027 verified decision-maker contacts tracked across these 11,110 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.